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CO2 Mineralization of Calcium Silicates Cements

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Construction and Building Materials".

Deadline for manuscript submissions: 20 February 2025 | Viewed by 2995

Special Issue Editors

School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, China
Interests: waste used in construction materials; low carbon emission binders; carbonation mineralization; high-performance concrete; cement-based materials; fire-resistance of concrete

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Guest Editor
School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, China
Interests: ultra-high-performance concrete; sustainable building material; fiber-reinforced polymer; durability; interfacial behavior; toughness
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Special Issue Information

Dear Colleagues,

In the last few decades, the construction industry has faced significant challenges due to its excessive consumption of natural resources and its contribution to greenhouse gas emissions. To limit the global temperature rise to 2 °C, a drastic reduction in CO2 emissions from cement production is crucial. The high CO2 footprint of Portland cement (PC) is caused by the decomposition of limestone and the consumption of flue during the sintering of clinker, which consists of alite and belite as the main mineral phases. One of the most feasible options to reduce the CO2 footprint in cement production is to utilize alternative low-lime calcium silicates such as wollastonite, rankinite, and belite. To enhance the reactivity of these low-lime calcium silicates, carbonization mineralization is an effective technology.

This field is rapidly advancing into new areas of discovery. However, the carbonation process, microstructure evolution, controlling of phase assemblage, origin of cementitious ability of the carbonation products, and performance enhancement methods have not been thoroughly explored.

It is my pleasure to invite you to submit a manuscript for this Special Issue. We welcome full papers, communications, and reviews.

Dr. Ye Li
Dr. Ao Zhou
Guest Editors

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Keywords

  • calcium silicates
  • carbonation mineralization
  • alternative binder
  • microstructure
  • carbonation products
  • calcium carbonates
  • cementitous ability

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Published Papers (2 papers)

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Research

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18 pages, 4840 KiB  
Article
Strength Recovery of Thermally Damaged High-Performance Concrete during Recuring
by Ye Li, Haodong Wang and Hangqi Lou
Materials 2024, 17(14), 3531; https://doi.org/10.3390/ma17143531 - 17 Jul 2024
Viewed by 810
Abstract
High-performance concrete (HPC) experiences significant degradation in its mechanical properties after fire exposure. While various post-fire curing methods have been proposed to rehabilitate thermally damaged concrete (TDC), the physical and chemical changes occurring during these processes are not well-understood. This study examines the [...] Read more.
High-performance concrete (HPC) experiences significant degradation in its mechanical properties after fire exposure. While various post-fire curing methods have been proposed to rehabilitate thermally damaged concrete (TDC), the physical and chemical changes occurring during these processes are not well-understood. This study examines the strength and microstructure restoration of HPC through water and water–CO2 cyclic recuring. HPC samples were initially heated to 600 °C and 900 °C, then subjected to water and cyclic recuring. Results indicate that the mechanical performance recovery of thermally damaged HPC is significantly better with cyclic recuring than with water recuring. The compressive strength of HPC samples exposed to 600 °C and 900 °C reached 131.6% and 70.3% of their original strength, respectively, after cyclic recuring. The optimal recuring duration for substantial recovery in thermally damaged HPC was determined to be 18 days. The strength recovery is primarily due to the healing of microcracks and the densification of decomposed cement paste. These findings clarify the physical and chemical processes involved in post-fire curing of HPC, highlighting the potential of water and water–CO2 cyclic recuring in the rehabilitation of TDC. Full article
(This article belongs to the Special Issue CO2 Mineralization of Calcium Silicates Cements)
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Review

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17 pages, 2879 KiB  
Review
A Review on the Carbonation of Steel Slag: Properties, Mechanism, and Application
by Shuping Wang, Mingda Wang, Fang Liu, Qiang Song, Yu Deng, Wenhao Ye, Jun Ni, Xinzhong Si and Chong Wang
Materials 2024, 17(9), 2066; https://doi.org/10.3390/ma17092066 - 28 Apr 2024
Cited by 1 | Viewed by 1538
Abstract
Steel slag is a by-product of the steel industry and usually contains a high amount of f-CaO and f-MgO, which will result in serious soundness problems once used as a binding material and/or aggregates. To relieve this negative effect, carbonation treatment was believed [...] Read more.
Steel slag is a by-product of the steel industry and usually contains a high amount of f-CaO and f-MgO, which will result in serious soundness problems once used as a binding material and/or aggregates. To relieve this negative effect, carbonation treatment was believed to be one of the available and reliable methods. By carbonation treatment of steel slag, the phases of f-CaO and f-MgO can be effectively transformed into CaCO3 and MgCO3, respectively. This will not only reduce the expansive risk of steel slag to improve the utilization of steel slag further but also capture and store CO2 due to the mineralization process to reduce carbon emissions. In this study, based on the physical and chemical properties of steel slag, the carbonation mechanism, factors affecting the carbonation process, and the application of carbonated steel slag were reviewed. Eventually, the research challenge was also discussed. Full article
(This article belongs to the Special Issue CO2 Mineralization of Calcium Silicates Cements)
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